Triclosan is a common antibiotic used in antiperspirants, toothpastes, and antibacterial soaps. You are a doctor studying the evolution of bacterial resistance to triclosan. You need to find a population of nonresistant bacteria
Where should you look?
A) In areas where triclosan-containing products are used frequently
B) In areas where these triclosan-containing products have not been used
C) In areas where bacteria are usually not found
D) In areas with low percentages of bacterial infection
B
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The leading candidate for the molecular replicator during the origin of cells is ____
a. pyranose b. xeno-nucleic acids c. protein d. RNA e. DNA
An X-linked carrier is a
a. homozygous dominant female. b. heterozygous female. c. homozygous recessive female. d. homozygous male. e. heterozygous male
Randomly selecting samples of experimental units from an environment can result in __________________.
A. sampling error B. blind testing C. evidence D. experimental design E. consensus
The process that causes embryonic cells to produce signals that alter the behavior of neighboring cells is known as
A. contact inhibition. B. ooplasmic localization. C. embryonic induction. D. pattern formation. E. gene splicing.